Operation:
To turn on/off the light:
Press the tail cap halfway to momentarily activate the light. Click the tail switch to turn the light on and off.

To change modes:
Five modes in total: firefly, low, medium, high, and strobe.
When the light is on, single press the side switch to rotate among firefly, low, medium and high. Long press to get strobe and then single press to end it.

Memory function:
The light will turn on in the last mode accessed, except for strobe.

Battery replacement:
Take off the tail cap, insert the battery with positive polarity toward the LED assembly(head of the light), install the tail cap and tighten all the way to operate the light.

As soon as you and Luke at theoudoorgearreview.com did reviews on this flashlight, they have become unavailable. Amazon does not have them and you can’t even get them from ThruNite. What power you guys must have 🙂